/**
 * Copyright (c) 2016-2019 人人开源 All rights reserved.
 *
 * https://www.renren.io
 *
 * 版权所有，侵权必究！
 */

package io.renren.common.utils;

import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 返回数据
 *
 * @author Mark sunlightcs@gmail.com
 */
public class R extends HashMap<String, Object> {
	private static final long serialVersionUID = 1L;
	
	public R() {
		put("code", 0);
		put("msg", "success");
	}
	
	public static R error() {
		return error(500, "未知异常，请联系管理员");
	}
	
	public static R error(String msg) {
		return error(500, msg);
	}
	
	public static R error(int code, String msg) {
		R r = new R();
		r.put("code", code);
		r.put("msg", msg);
		return r;
	}

	public static R ok(String msg) {
		R r = new R();
		r.put("msg", msg);
		return r;
	}
	
	public static R ok(Map<String, Object> map) {
		R r = new R();
		r.putAll(map);
		return r;
	}
	
	public static R ok() {
		return new R();
	}

	@Override
	public R put(String key, Object value) {
		super.put(key, value);
		return this;
	}

	/**
	 * 处理hibernate validator 数据绑定异常信息
	 *
	 */
	public static R onBindingError(List<ObjectError> errors) {
		R json = new R();
		json.put("code", 500);
		json.put("msg", praseErrorMessage(errors));
		return json;
	}

	public static String praseErrorMessage(List<ObjectError> errors) {
		StringBuffer stringBuffer = new StringBuffer();
		for (ObjectError error : errors) {
			if (error instanceof FieldError) {
				FieldError fieldError = (FieldError) error;
				stringBuffer.append(fieldError.getDefaultMessage());
				stringBuffer.append(",");
			}
		}
		return stringBuffer.toString().substring(0, stringBuffer.toString().length() - 1);
	}
}
